preterm labor??

I hate not knowing what's exactly going on right now. I have GD so when my blood sugar was low this morning I had to call my nurse. She had me drink a half a cup of milk and waited to see if I felt baby move but nothing. So on top of that I've been having lower dull back pain. Keep in mind I just finished moving these past couple days with sh doin all the hard stuff of course but its really took a toll on my body. Which means I can't tell if my pain in my back is from all the running around while pregnant or signs of preterm labor. I've been laying down for bout a hour and a half and it finally seems like lo is up and moving. My back still hurts and not sure if I'm experiencing Braxton hicks. Any advice ladies. I'm open to suggestions. I'm only 33 weeks on Monday and don't want her out if she's not ready yet! And from time to time I believe I'm having light cramps in my stomach.